./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_vector_difference_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_vector_difference_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7263b2c7ab28b481620789bcaa79c3e966cab937e9920a12d1160d17415db571 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:09:31,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:09:31,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:09:31,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:09:31,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:09:31,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:09:31,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:09:31,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:09:31,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:09:31,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:09:31,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:09:31,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:09:31,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:09:31,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:09:31,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:09:31,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:09:31,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:09:31,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:09:31,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:09:31,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:09:31,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:09:31,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:09:31,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:09:31,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:09:31,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:09:31,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:09:31,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:09:31,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:09:31,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:09:31,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:09:31,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:09:31,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:09:31,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:09:31,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:09:31,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:09:31,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:09:31,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:09:31,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:09:31,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:09:31,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:09:31,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:09:31,137 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:09:31,157 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:09:31,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:09:31,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:09:31,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:09:31,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:09:31,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:09:31,158 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:09:31,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:09:31,159 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:09:31,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:09:31,159 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:09:31,159 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:09:31,159 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:09:31,159 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:09:31,160 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:09:31,160 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:09:31,160 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:09:31,160 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:09:31,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:09:31,161 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:09:31,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:09:31,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:09:31,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:09:31,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:09:31,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:09:31,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:09:31,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:09:31,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:09:31,162 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:09:31,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:09:31,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:09:31,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:09:31,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:09:31,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:09:31,164 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:09:31,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:09:31,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:09:31,164 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:09:31,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:09:31,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:09:31,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:09:31,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7263b2c7ab28b481620789bcaa79c3e966cab937e9920a12d1160d17415db571 [2022-12-14 08:09:31,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:09:31,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:09:31,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:09:31,377 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:09:31,377 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:09:31,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_vector_difference_ground.i [2022-12-14 08:09:33,956 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:09:34,114 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:09:34,114 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/sv-benchmarks/c/array-examples/standard_vector_difference_ground.i [2022-12-14 08:09:34,120 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/data/88cbcd7c1/59ee6b261ae84e009dbdf4212caebd3a/FLAG3bf510878 [2022-12-14 08:09:34,131 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/data/88cbcd7c1/59ee6b261ae84e009dbdf4212caebd3a [2022-12-14 08:09:34,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:09:34,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:09:34,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:09:34,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:09:34,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:09:34,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af58a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34, skipping insertion in model container [2022-12-14 08:09:34,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:09:34,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:09:34,259 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/sv-benchmarks/c/array-examples/standard_vector_difference_ground.i[826,839] [2022-12-14 08:09:34,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:09:34,279 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:09:34,287 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/sv-benchmarks/c/array-examples/standard_vector_difference_ground.i[826,839] [2022-12-14 08:09:34,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:09:34,303 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:09:34,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34 WrapperNode [2022-12-14 08:09:34,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:09:34,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:09:34,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:09:34,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:09:34,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,328 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2022-12-14 08:09:34,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:09:34,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:09:34,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:09:34,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:09:34,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,345 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:09:34,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:09:34,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:09:34,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:09:34,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (1/1) ... [2022-12-14 08:09:34,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:09:34,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:34,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:09:34,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:09:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:09:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:09:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:09:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:09:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:09:34,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:09:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:09:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:09:34,460 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:09:34,462 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:09:34,567 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:09:34,590 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:09:34,590 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 08:09:34,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:09:34 BoogieIcfgContainer [2022-12-14 08:09:34,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:09:34,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:09:34,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:09:34,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:09:34,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:09:34" (1/3) ... [2022-12-14 08:09:34,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f12a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:09:34, skipping insertion in model container [2022-12-14 08:09:34,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:09:34" (2/3) ... [2022-12-14 08:09:34,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f12a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:09:34, skipping insertion in model container [2022-12-14 08:09:34,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:09:34" (3/3) ... [2022-12-14 08:09:34,599 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_vector_difference_ground.i [2022-12-14 08:09:34,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:09:34,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:09:34,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:09:34,661 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@69cee408, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:09:34,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:09:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:09:34,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:34,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:09:34,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:34,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1658188629, now seen corresponding path program 1 times [2022-12-14 08:09:34,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:34,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666243494] [2022-12-14 08:09:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:34,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:09:34,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:34,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666243494] [2022-12-14 08:09:34,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666243494] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:34,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:09:34,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:09:34,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433351021] [2022-12-14 08:09:34,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:09:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:09:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:09:34,930 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:34,970 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-12-14 08:09:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:09:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:09:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:34,980 INFO L225 Difference]: With dead ends: 18 [2022-12-14 08:09:34,980 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 08:09:34,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:09:34,986 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:34,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:09:35,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 08:09:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 08:09:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 08:09:35,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-12-14 08:09:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:35,016 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 08:09:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 08:09:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 08:09:35,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:35,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:35,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:09:35,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:35,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1478451298, now seen corresponding path program 1 times [2022-12-14 08:09:35,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:35,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736132615] [2022-12-14 08:09:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:35,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:09:35,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:35,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736132615] [2022-12-14 08:09:35,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736132615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:35,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525607589] [2022-12-14 08:09:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:35,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:35,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:35,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:35,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:09:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:35,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:09:35,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:09:35,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:09:35,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525607589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:35,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371631747] [2022-12-14 08:09:35,269 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:09:35,269 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:35,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:35,278 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:35,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:35,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,407 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 08:09:35,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 08:09:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,484 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 08:09:35,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 08:09:35,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 08:09:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:35,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:35,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:35,710 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 08:09:35,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2022-12-14 08:09:35,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:35,832 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:09:35,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 08:09:35,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:35,894 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:09:35,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:09:35,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:35,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:35,959 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:09:35,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:09:35,986 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:36,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:09:36,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:36,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:36,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 08:09:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375978097] [2022-12-14 08:09:36,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:36,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:09:36,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:09:36,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:09:36,125 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:36,155 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-12-14 08:09:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:09:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 08:09:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:36,156 INFO L225 Difference]: With dead ends: 23 [2022-12-14 08:09:36,156 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 08:09:36,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:09:36,157 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:36,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:09:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 08:09:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 08:09:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-12-14 08:09:36,160 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-12-14 08:09:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:36,160 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-12-14 08:09:36,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-12-14 08:09:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:09:36,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:36,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:36,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:09:36,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:36,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash 999923307, now seen corresponding path program 2 times [2022-12-14 08:09:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:36,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539913348] [2022-12-14 08:09:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:09:36,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:36,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539913348] [2022-12-14 08:09:36,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539913348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:36,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000380785] [2022-12-14 08:09:36,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:09:36,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:36,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:36,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:36,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:09:36,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:09:36,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:09:36,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:09:36,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:09:36,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:09:36,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000380785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:36,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300106282] [2022-12-14 08:09:36,655 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:09:36,655 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:36,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:36,656 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:36,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:36,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,723 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 08:09:36,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 08:09:36,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 08:09:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 08:09:36,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:36,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:36,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:36,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:36,924 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 08:09:36,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-12-14 08:09:37,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:37,423 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:09:37,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 08:09:37,466 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-12-14 08:09:37,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-12-14 08:09:37,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:37,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:37,525 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:09:37,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:09:37,542 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:37,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '263#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:09:37,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:37,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:37,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 08:09:37,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446590971] [2022-12-14 08:09:37,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:37,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 08:09:37,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:37,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 08:09:37,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:09:37,708 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:37,755 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-12-14 08:09:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:09:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 08:09:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:37,756 INFO L225 Difference]: With dead ends: 38 [2022-12-14 08:09:37,756 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 08:09:37,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:09:37,757 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:37,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:09:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 08:09:37,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-14 08:09:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-12-14 08:09:37,760 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2022-12-14 08:09:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:37,761 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-12-14 08:09:37,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-12-14 08:09:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 08:09:37,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:37,761 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:37,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:09:37,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:37,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2039731467, now seen corresponding path program 3 times [2022-12-14 08:09:37,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:37,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749715028] [2022-12-14 08:09:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:37,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 08:09:38,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:38,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749715028] [2022-12-14 08:09:38,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749715028] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:38,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089284648] [2022-12-14 08:09:38,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:09:38,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:38,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:38,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:38,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:09:38,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:09:38,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:09:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:09:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 08:09:38,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 08:09:38,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089284648] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:38,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875941015] [2022-12-14 08:09:38,565 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:09:38,566 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:38,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:38,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:38,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,617 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 08:09:38,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 08:09:38,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,678 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 08:09:38,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 08:09:38,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 08:09:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:38,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:38,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:38,861 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 08:09:38,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-12-14 08:09:39,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:39,119 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:09:39,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 08:09:39,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:39,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:39,159 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:09:39,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:09:39,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:39,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:39,212 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:09:39,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:09:39,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:39,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '560#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:09:39,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:39,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:39,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 08:09:39,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377151098] [2022-12-14 08:09:39,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:39,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 08:09:39,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:39,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 08:09:39,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:09:39,485 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:39,558 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2022-12-14 08:09:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 08:09:39,559 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 08:09:39,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:39,559 INFO L225 Difference]: With dead ends: 68 [2022-12-14 08:09:39,559 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 08:09:39,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:09:39,561 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:39,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:09:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 08:09:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-12-14 08:09:39,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-12-14 08:09:39,568 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2022-12-14 08:09:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:39,569 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-12-14 08:09:39,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:39,569 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-12-14 08:09:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 08:09:39,570 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:39,570 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:39,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:09:39,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:39,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1825135179, now seen corresponding path program 4 times [2022-12-14 08:09:39,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:39,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689592179] [2022-12-14 08:09:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:39,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 08:09:40,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:40,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689592179] [2022-12-14 08:09:40,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689592179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:40,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400659004] [2022-12-14 08:09:40,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:09:40,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:40,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:40,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:40,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:09:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:09:40,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 08:09:40,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 08:09:41,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400659004] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:41,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [790173617] [2022-12-14 08:09:41,039 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:09:41,040 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:41,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:41,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:41,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,100 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 08:09:41,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 08:09:41,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 08:09:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 08:09:41,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:41,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:41,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:41,231 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 08:09:41,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2022-12-14 08:09:41,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:41,288 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:09:41,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 08:09:41,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:41,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:41,327 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:09:41,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:09:41,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:41,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:41,379 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:09:41,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:09:41,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:42,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1133#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:09:42,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:42,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:42,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 08:09:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579527204] [2022-12-14 08:09:42,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:42,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 08:09:42,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 08:09:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 08:09:42,014 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:42,232 INFO L93 Difference]: Finished difference Result 128 states and 179 transitions. [2022-12-14 08:09:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 08:09:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 08:09:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:42,234 INFO L225 Difference]: With dead ends: 128 [2022-12-14 08:09:42,234 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 08:09:42,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 98 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 08:09:42,236 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:42,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:09:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 08:09:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-12-14 08:09:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-12-14 08:09:42,243 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2022-12-14 08:09:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:42,243 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-12-14 08:09:42,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:09:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-12-14 08:09:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 08:09:42,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:42,244 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:42,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:09:42,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:42,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:42,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1148140341, now seen corresponding path program 5 times [2022-12-14 08:09:42,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:42,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007958414] [2022-12-14 08:09:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:42,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 08:09:44,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:44,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007958414] [2022-12-14 08:09:44,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007958414] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:44,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616414763] [2022-12-14 08:09:44,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:09:44,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:44,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:44,306 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:44,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:19:22,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 08:19:22,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:19:22,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 08:19:22,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:19:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 08:19:22,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:19:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 08:19:23,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616414763] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:19:23,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931133290] [2022-12-14 08:19:23,943 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:19:23,943 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:19:23,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:19:23,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:19:23,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:19:23,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:23,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:23,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:24,008 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 08:19:24,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 08:19:24,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:24,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:24,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:24,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 08:19:24,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:24,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:24,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 08:19:24,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:24,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:24,167 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 08:19:24,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-12-14 08:19:24,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:24,403 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:19:24,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 08:19:24,439 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-12-14 08:19:24,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-12-14 08:19:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:24,491 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:19:24,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:19:24,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:19:26,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2258#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:19:26,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:19:26,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:19:26,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2022-12-14 08:19:26,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463787560] [2022-12-14 08:19:26,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:19:26,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 08:19:26,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:19:26,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 08:19:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 08:19:26,353 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:19:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:19:26,788 INFO L93 Difference]: Finished difference Result 248 states and 347 transitions. [2022-12-14 08:19:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 08:19:26,788 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-12-14 08:19:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:19:26,789 INFO L225 Difference]: With dead ends: 248 [2022-12-14 08:19:26,789 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 08:19:26,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 194 SyntacticMatches, 47 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7375 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 08:19:26,791 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:19:26,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:19:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 08:19:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-12-14 08:19:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0153846153846153) internal successors, (198), 195 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:19:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-12-14 08:19:26,802 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 98 [2022-12-14 08:19:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:19:26,802 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-12-14 08:19:26,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.556701030927835) internal successors, (151), 97 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:19:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-12-14 08:19:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-14 08:19:26,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:19:26,805 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-12-14 08:19:26,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:19:27,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:19:27,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:19:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:19:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1722738229, now seen corresponding path program 6 times [2022-12-14 08:19:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:19:27,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127051044] [2022-12-14 08:19:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:19:27,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:19:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:19:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 08:19:32,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:19:32,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127051044] [2022-12-14 08:19:32,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127051044] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:19:32,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020576628] [2022-12-14 08:19:32,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:19:32,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:19:32,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:19:32,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:19:32,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:19:32,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:19:32,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:19:32,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 2337 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 08:19:32,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:19:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 08:19:33,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:19:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 08:19:39,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020576628] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:19:39,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195501867] [2022-12-14 08:19:39,558 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:19:39,558 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:19:39,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:19:39,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:19:39,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:19:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,607 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 08:19:39,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 08:19:39,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,664 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 08:19:39,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 08:19:39,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-12-14 08:19:39,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:19:39,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:39,776 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-12-14 08:19:39,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2022-12-14 08:19:39,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:39,838 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:19:39,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 08:19:39,878 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-12-14 08:19:39,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-12-14 08:19:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:19:39,926 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:19:39,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:19:39,950 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:19:45,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4487#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:19:45,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:19:45,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:19:45,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-12-14 08:19:45,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299727629] [2022-12-14 08:19:45,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:19:45,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 08:19:45,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:19:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 08:19:45,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 08:19:45,795 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:19:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:19:49,764 INFO L93 Difference]: Finished difference Result 488 states and 683 transitions. [2022-12-14 08:19:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 08:19:49,764 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-12-14 08:19:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:19:49,766 INFO L225 Difference]: With dead ends: 488 [2022-12-14 08:19:49,766 INFO L226 Difference]: Without dead ends: 388 [2022-12-14 08:19:49,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 386 SyntacticMatches, 95 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28591 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 08:19:49,769 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 1262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:19:49,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1262 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 08:19:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-12-14 08:19:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-12-14 08:19:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.0077519379844961) internal successors, (390), 387 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:19:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 390 transitions. [2022-12-14 08:19:49,785 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 390 transitions. Word has length 194 [2022-12-14 08:19:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:19:49,785 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 390 transitions. [2022-12-14 08:19:49,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0310880829015545) internal successors, (199), 192 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:19:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 390 transitions. [2022-12-14 08:19:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-12-14 08:19:49,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:19:49,790 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1] [2022-12-14 08:19:49,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:19:49,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:19:49,991 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:19:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:19:49,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1952988213, now seen corresponding path program 7 times [2022-12-14 08:19:49,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:19:49,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257967176] [2022-12-14 08:19:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:19:49,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:19:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:20:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-12-14 08:20:12,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:20:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257967176] [2022-12-14 08:20:12,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257967176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:20:12,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365130539] [2022-12-14 08:20:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:20:12,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:20:12,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:20:12,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:20:12,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:20:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:20:12,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 4641 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 08:20:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:20:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-12-14 08:20:13,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:20:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2022-12-14 08:20:38,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365130539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:20:38,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48207558] [2022-12-14 08:20:38,739 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:20:38,739 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:20:38,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:20:38,740 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:20:38,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:20:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,788 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 08:20:38,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 08:20:38,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,842 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 08:20:38,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 08:20:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-12-14 08:20:38,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:20:38,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:38,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:38,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:38,967 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 08:20:38,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-12-14 08:20:39,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:39,153 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:20:39,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 08:20:39,191 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-12-14 08:20:39,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-12-14 08:20:39,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:39,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:20:39,235 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 08:20:39,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 08:20:39,251 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:20:59,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8924#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem7#1| (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:20:59,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:20:59,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:20:59,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-12-14 08:20:59,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439591945] [2022-12-14 08:20:59,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:20:59,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 08:20:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:20:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 08:20:59,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 08:20:59,694 INFO L87 Difference]: Start difference. First operand 388 states and 390 transitions. Second operand has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:45,595 INFO L93 Difference]: Finished difference Result 968 states and 1355 transitions. [2022-12-14 08:21:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-14 08:21:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2022-12-14 08:21:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:45,600 INFO L225 Difference]: With dead ends: 968 [2022-12-14 08:21:45,600 INFO L226 Difference]: Without dead ends: 772 [2022-12-14 08:21:45,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1348 GetRequests, 770 SyntacticMatches, 191 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112495 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 08:21:45,608 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 2137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2137 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:45,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2137 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 08:21:45,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-12-14 08:21:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2022-12-14 08:21:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.0038910505836576) internal successors, (774), 771 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 774 transitions. [2022-12-14 08:21:45,630 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 774 transitions. Word has length 386 [2022-12-14 08:21:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:45,630 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 774 transitions. [2022-12-14 08:21:45,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0155844155844156) internal successors, (391), 384 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 774 transitions. [2022-12-14 08:21:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-12-14 08:21:45,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:45,644 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:45,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:21:45,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:45,846 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:21:45,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash -79882293, now seen corresponding path program 8 times [2022-12-14 08:21:45,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:45,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536447157] [2022-12-14 08:21:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:45,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:23:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 146306 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 73153 trivial. 0 not checked. [2022-12-14 08:23:26,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:23:26,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536447157] [2022-12-14 08:23:26,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536447157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:23:26,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641229150] [2022-12-14 08:23:26,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:23:26,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:23:26,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:23:26,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:23:26,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4e7b5-2890-40a4-bdc0-51a785456156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process